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United States Patent | 5,506,885 |
Hamilton | April 9, 1996 |
A method and apparatus for utilizing DTMF tones and supervisory tones in a call processing system to adjust parameters for future tones and/or speech. The tones initially received are analyzed to determine characteristics such as signal-to-noise ratio, twist, signal level, etc. Processing parameters for future tones and speech are adjusted based upon the characteristics of a first tone.
Inventors: | Hamilton; Chris (41 Harrison Ave., Montclair, NJ 07043) |
Appl. No.: | 289315 |
Filed: | August 11, 1994 |
Current U.S. Class: | 379/22.02; 379/257; 379/283; 379/347 |
Intern'l Class: | H04M 001/24; H04M 001/60 |
Field of Search: | 379/283,351,257,102,75,406,282,6,29,27,31,347,390 |
4028493 | Jun., 1977 | Brennemann et al. | 379/257. |
4399535 | Aug., 1983 | Southard | 379/257. |
4488274 | Dec., 1984 | Plunkett, Jr. | 379/75. |
4627098 | Dec., 1986 | Dolikian et al. | 379/102. |
4654881 | Mar., 1987 | Dolikian et al. | 379/102. |
4694482 | Sep., 1987 | Reesor et al. | 379/27. |
4696031 | Sep., 1987 | Freudberg et al. | 379/257. |
4807274 | Feb., 1989 | Kousa | 379/6. |
4887288 | Dec., 1989 | Erving | 379/6. |
5073919 | Dec., 1991 | Hagensick | 379/29. |
5257309 | Oct., 1993 | Brandman et al. | 379/283. |
5353342 | Oct., 1994 | Pietrowicz | 379/257. |
5353345 | Oct., 1994 | Galand | 379/283. |
5392348 | Feb., 1995 | Park et al. | 379/283. |
5406621 | Apr., 1995 | Binal | 379/351. |